What do all possesive nouns contain? commas
capital letters
apostrophes
none of the above

Apostrophes

Explanation:

A possessive noun is a noun that possesses something—i.e., it has something. In most cases, a possessive noun is formed by adding an apostrophe +s to the noun, or if the noun is plural and already ends in s, only an apostrophe needs to be added.

alright, so here, the author clearly thinks that flooding the canyon was a bad idea and is showing bias against it.

devin will have to drain the rain out from his garage.